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# SECTION D ELECTRICITY AND MAGNETISM ## Within a medium v = Af ## Lens equation 1/u + 1/v = 1/f ## Changing mediums v2=λ2*sin(θη) η ## Magnification m = v/u ## m= h/h_o ## Charge Q = It ## Q = Nq ## Energy and work E = VQ ## E = Vlt ## Power P = VI ## P = PR ## emf = sum of pd's in circuit P =...

# SECTION D ELECTRICITY AND MAGNETISM ## Within a medium v = Af ## Lens equation 1/u + 1/v = 1/f ## Changing mediums v2=λ2*sin(θη) η ## Magnification m = v/u ## m= h/h_o ## Charge Q = It ## Q = Nq ## Energy and work E = VQ ## E = Vlt ## Power P = VI ## P = PR ## emf = sum of pd's in circuit P = IR ## E = PRt ## E = V2t ## E = V2/R ## E= PR/R ## Transformers N/Np = Vs/Vp ## Efficiency = Ps/Pp * 100 # SECTION E THE PHYSICS OF THE ATOM ## Ideal transformers (100% efficient) N/Np = Vs/Vp